Plan 9 from Outer Space (1959) - reputed to be the worst movie ever made. The juries out here. We still think Curse of the Swamp Creature might have been worse.
Unknown Island (1948) - for a 1948 dinosaur movie, this one is really pretty good. You will laugh at the dinosaurs, though.Prisoners Of The Lost Universe (1983) starring Richard Hatch and Kay Lenz - Bad, bad 80's movie that was part of a 50 pack.